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National Geologic Map Database

Geologic Unit: Blanchester

Usage:

Blanchester Member of Waynesville Formation of Cincinnati group (informal) (OH)

(informal Cincinnati group is the usage of the OH Geol. Survey. The rank or lithologic term should not be capitalized.)


Geologic age:

Late Ordovician (Cincinnatian; Richmondian)


Type section, locality, area and/or origin of name:

Named from Blanchester, Clinton Co., southwestern OH (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

Cincinnati arch


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).